There are really only two differences between a vodka soda and a Moscow Mule. First, mules are made with ginger beer in lieu of soda, and second, the Moscow Mule belongs to Oprah—it's her favorite cocktail. Given Oprah's full-throated endorsement, it's unusual that so few Portland bars list mules on their menus. Simply asking for one, more often than you might think, may stump your bartender. This may seem strange more...











